Roller flour-mill



(No Model.) 5 Sheets-Sheet 1.

-A. N.WOLF.

ROLLER FL0U11l MILL. No. 294,947., Egli Patented Mar. 11, 1884.

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ROLLER FLOUR MILL.

No. 294,947. 171%@ Patented Mar. 11, 1884.

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No. 294,947. Patented Maf. 11, 1884,

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ROLLER PLOUR MILL. No. 294,947. 'Patented Mar. 11, 1884.

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ArnNr ABRAHAM N. VOLF, O-F'ALLENTOVN, PENNSYLr ANIA.

ROLLER FLoUR-MILL..

SPECIFICATION formingV part of Letters Patent No. 294,947, dated March 11, 1884.

Application filled August 20, 1883. (No model.)

To @ZZ whom, it may concern:

Be it known that I, A. N. VOLIj, of Allentown, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Roller Flour-Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being'had to the accompanying drawings, which form part of this specification.

Figure l "is a side elevation of a mill emhodying my invention. Fig. 2 is a front elevation of a roller-mill having a single pair of rolls, the lframe-work being shown in section. Fig. 3 is a vertical section taken through the hopper. Fig. 4 is a perspective of the feedboard, part of its attachments, the eut-off, and the feed-roller. Figs. 5, 6, 7, and 8 are detail views ofthe cam and other parts used in connection with the lever D.

A8 represents the hopper, in which is suspended at the points bi, by means of the arms Ai, the feeding-board A. rIhe upper edge of the board A catches under the shield A5 for the purpose of preventing any passage of the grain past this edge of the board. 'This board A, through the pins or connections is connected to the levers a, placed upon the outside of both ends of the hopper, and which levers a .are pivoted at their upper ends to the links connected withl the bell-crank-levers A'. rl`he arrangement and construction of these operating parts are the same upon each end of the hopper.

The lower ends of these levers a bear against the two cams L upon the ends of t-he shaft ofthe feed-roller M, and as the shaft ismade to revolve, these levers ware caused to vibrate, and this vibratory m ove ment is in turn imparted to the board A, for the purpose of keeping upv an even and regular feed through the connections at. These connections at pass through suitable slots in the side of the hopper, and thus cause-'the levers A'L and a to always move together. By thus connecting the levers AL and a rigidly together by means of the connections ci, they have the same move- --ment, and hence the movement imparted to cams L by means of the bell-crank levers A',

which are connected at the upper ends of their l short arms to the upper ends of the said levers a. By throwing the bell-'crank levers A' upward, the levers a are thrown back at their upper ends, and being pivoted to the feedboard at the pins c2, the lower ends of saidlevers c are thrown forward and away from the cams L, as shown by dotted lines in Fig. l, and the vibrating or swinging ofthe feed-board is thus instantly stopped. levers A' back to their central and horizontal positions, the swinging motion of the feedboard is resumed. The levers A also control the size of the opening between the feed-board Aand the curved surface of the cut-off N, through which opening the grain is fed to the rolls. As the levers A' are moved downward, the upper ends of the arms a are thrown forward, while their lower ends resting against the cams are fixed, and the feed-board A, being secured to the arms va at a2, is carried forward with it and away from the cut-off N, as

shown by dotted lines, thus increasing the opening between them and allowing a larger quantity of grain to pass. grain is further regulated automatically by the cut-off N and the plate N', the latter being balanced at the fulcrum A by the counterweight, shown inside -of the hopper at the rear, and connected to the cut-off N by a link and lever, as shown. Feed-roll M revolves from right toleft,and the grain passes to the grinding-rolls between it and the inner edge of the cut-off N. By bringing the edge of the cut-off N in contact with thefeed-roller M, the feed is stopped, and the quantity fed to the rolls is regulated bythe opening between them. The grain falling from the top of the hopper lights The feeding of the By bringing the first upon the plate N', which swings with the i place by means of the counter-weight di, shown in the rear, and by the same movement the -cut-off N is again moved forward closer to the feed-roll M to diminish the feed or cut it off en-V tirely, as the case may be.

The space between M and N being thus ICO The bearings of one roll, Y, are rigidly secured to the ltop plate of the frame O', while the bearings ot' t-he other roll, Y', are iixed in levers B, so constructed as to admit of adjustment of said roll toward or away from the roll in rigid bearings. 2y this construction I am able, by my invention, to adjust the parts quickly and with accuracy, so that between the two ends ot the rolls there is not the slightest variation. The levers B at the two ends of the adjustable roll are precisely alike. They rest at the lower extremities of the inner arms upon the pins B, upon which they also turn in adjusting. The other and longer arms of these levers 'B extend ont-ward, and are turned down so as to clear the outer edge of the i'rameworkO and O. lfn the under sides, at the outer ends of the levers l), are the inverted V-shaped recesses, where they rest upon the knife-edges upon the upper sides of the ends of the spring-actuated bar C, which extends across the mill from side to side, and supports upon its ends the outer extremities ol' both the levers il, which carry the roll Y. The spring-actuated bar C is kept up against the levers B by means of a strong spiral spring contained in the box F, cored out in the middle of the bar, and this bar is clamped against the outer ends ofthe levers ll by means of the hand-wheel l), resting upon the top l'rame, O', and a bolt, C', passing through the coil-spring and the bar and having` a thread cut upon its upper end. A thread is also cut upon tho lower end ot' the bolt C, and a shoulder is turned upon the bolt, which rests upon the top of the bar C. Ey means of the nut on the lower end ot' the bolt C and the shoulder resting on the bar C, the tension of the coilspring contained in the box F is regulated, so that it may l e stronger or weaker according to the work required. Thus by turning the hand-wheel D the bar C is lifted, and by it the outer end of both levers B raised, thus bringing the adjustable roll Y nearer tothe roll Y. It is moved away 'from Y by turning the handwheel D in the opposite direction. Upon the top of each lever li, near the outer end, is hand-wheel la, through which a bolt, E, passes downward through l5, and is tapped into the top frame, O. This is set at such a point as to prevent the roll Y from coming into actual contact with the roll Y, however close maybe the adjustment. The hand-leverDis used to throw the rolls apart instantly and by a single movement. The bolt passing up through the spiral spring F passes also through the inner end of the lever D. In the under side of the inner end o1" D is eut a spiral, y, engaging with another, fr, upon the upper side of a boss, at, resting upon the top of the top frame, O. The spiral or incliner on theboss engageswith a corresponding spiral or incline, y, in the end of the lever D, so that when the lever is turned in one direction it is forced upward, and when turned in the other it sinks downward. Thus by turning the lever D t-he rolls Y and Y may be instantly thrown apart, and by turning D in the opposite direction they may be instantly brought together again without altering or disturbing in the least the adjustment made through the hand-wheel l). This is a great advantage in stopping and start-ing rolls. The rolls are separated for this purpose by means of the lever D alone, and the rolls, after being once accurately set l'or their work, need not be altered at all, no matter how often the mill may be stopped.

By means ofthe levers l5,the bar (,and the spiral spring supporting them, any obstruction or foreign substance which may possibly get between the rolls with the grain'will be allowed to pass without disturbing the adjustment or injuring any of the parts. lt will for an instant iorce the adjustable roll Y away from the iixed roll Y, 'forcing the outer arms of the levers 'B and the ends of the bar C downward. soon as it has passed from the rolls the roll Y will be brought back to its place by means of the coil-spring F. The revolving brush G is arranged in a spiral upon the drum G. The drum G, having the bristles G secured thereto so as to i'orm a spiral brush, is journaled in the frame just under the rolls YY. Just under this spiral brush G G is formed a concave, j, with which the bristles G come in contact. As the brush G G is made to revolve, the spirally-arranged bristles cause the ground grain to move from one end of the concave toward the discharge at the other end. The bristles strike thelower sides of both rolls Y Y as they revolve, and brush from them all matter that may adhere to them, keeping the rolls clean and bright at all times. The brush itself is kept properly clean and free from gathering matter by the sweeping or striking action ol' the bristles as they revolve and come in contact with the i'aces of the rolls above. The revolving brush, by means of its centrifugal force and sweeping action against the rolls, is itself kept clean, and at the same time removes every substance i'rom the rolls. The revolving brush, being spiral in form, acts alsoas a conveyer, throwing lengthwise as well as crosswise, and conveying the broken wheat to one end of the concave, where it passes through the spout l? into one end of the scalping-reel, where, by means ot' thelifting plates or blades H and the brushes I, acting against the wirecloth J, the smaller parts of the broken grain are separated from the coarser.

Having thus described my invention, l claiml. The combination of the hopper provided with slots through its ends, the swinging levers, which are pivoted at their upper ends inside thereof, and have the feed-board connected to them near their-lower ends, and a mechanism which is connected with the pivoted levers for causing them. to reciprocate, and thus keep the feed-board in motion, substantially as shown and described.

2. The combination of the hopper, the'swnging feed-board, pivoted arms connected there- IOO IIO

to, pivoted levers upon the outside of thehopl 5. The combination of the frame, the two per, and revolving cams for moving the levers, and thereby imparting a constant reciprocating motion to the board, substantially as shown and described.

3. The combination of the hopper, the reciprocating feed-board, pivoted arms A4, connected thereto, the pivoted operating-levers upon the outer ends of the hopper, and operating-cams, with the bell-crank levers A and connecting-links, substantially as set forth.

4. The combination of the frame, the bar C, provided with the box F, the spiraled boss a5 x, the bolt Which passes through the bar, the coil-spring, and a hand-lever having a spiral formed at its inner end, substantially as specied.

side levers, B, the bolts and wheels EE', connected therewith, the levers D', the spiraled 2o .boss a5 a?, bolt C, bar C, and coil-spring, substantially as shown.

6. The combination of the rolls Y Y', a revolving spiral brush, G, which brushes both rollers at once, the trough f3, the scalping-reel 25 I, and screen J, substantially as shown and described.

In testimony whereof I affix my signaturein presence of two Witnesses.

ABRAHAM N. VOLF.

W'itnesses:

EDWARD RUHE, WINsLoW Woon. 

